I toss quilts in the washing machine with regular detergent at about half the usual amount and on the knit/permanent press cycle with cold water, and then into the dryer on a gentle heat. I don't use color- catchers, but I always pre-wash fabrics. for pre-washing, I get the fabric, the detergent, a sack of quarters, a cheap paperback, and head to the local laundromat. I put the fabric into one of the giant machines since they get a double rinse. Also, with the glass door it's very easy to watch and see if a fabric is bleeding! After the dryer, I use those long, long, long tables to spread out the fabric and very carefully fold it. After the fabric is washed, dried, and properly folded I tuck in a note as to yardage. I almost never have to iron the fabric before use.